Elevator protective apparatus.



W. KEATING.

ELEVATOR PROTECTIVE APPARATUS.

APPLITATION FILED IAN. TT TSH Patented Apr. 3, T917.

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WILLIAM KEATING, OF NEW YORK, 1\T. Y.

ELEVATOR PROTECTIVE APPARATUS. y

Specification of Letters Patent.

Patented Apr. 3, 1917.

Appli-cation led January 17, 1917. Serial No. 142,830.

To all whom t may concern.'

Be it known that I, WILLIAM KEATING, a citizen of the United States, and a resident of New York, county and State of New York, have invented certain new and useful Improvements in Elevator Protective Apparatus, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to safety devices for elevators and the like, and particularly to such as are adapted to prevent the star-ting of the car when the car or well doors are open.

In my Patent No. 1,099,181 granted J une 9, 1914, I have shown and described a safety device for preventing the starting of the car when the car door is open. My present invention not only performs this function but also has for one object to prevent the starting of the car when the door of the well or the door of the car is open, thereby insuring the safety not only of the passengers within the car but also the persons approaching the entrance to the elevator well.

Furthermore, it has been my aim to pro'- vide a relatively simple and direct-acting structure which shall not interfere with the opening of the doors under proper conditions but on the contrary shall enable the car operator to open the doors very readily.

Another object is to provide means for locking the door of the elevator well that shall be adapted to be interlocked with the car door to prevent the closing of the car door except when the well door is locked.

Another object of my invention is to provide a structure by which the aforesaid objects may be accomplished and moreover one that shall not be damaged if the carl should creep in either an upward or downward direction.

In order that my invention may be thoroughly understood, I will now proceed to describe the same in the following specification andthen point out the novel features thereof in appended claims.

Referring to the drawings:

Figure 1 is a partially sectional elevation, taken from within an elevator car and looking out, both the well d oor and the car gate being open.

Fig. 2 is a corresponding view with both the door and the gate closed.

Fig. 3 is a sectional elevation at right angles to Fig. 1, with both doors open.

Fig. 4 is a partially sectional view, drawn to a larger scale and showing a portionfof the interlocking mechanism for the well door.

Fig. 5 is a partially sectional plan view of the same mechanism, and

Fig. 6 is a partially sectional plan view of the locking bar which prevents the movement of the control lever.

Like characters of reference designate corresponding parts in all the figures.

10 is an elevato-r car having a gate 11, and a control lever 12 which extends upwardly through a slot 13 in the controller casing 14. The control lever 12 is adapted to swing backward or forward from a central off position to drive the car in an upward or downward direction in a well known manner.

A shaft 15 is rotatively mounted above the casing 14 of the controller and close to the lever 12 as clearly shownin Figs. 1, 2 and 6. A bell crank lever 16 is secured to the shaft 15 at one end and has one relatively long downwardly extending arm 17 connected to the gate 11.

A locking bar 18 which is U-shaped or otherwise formed to yprovide a notch 19 is secured to the shaft 15 as shown in Fig. 6, the arrangement of parts being such that a rotative movement of the shaft 15 is produced as the gate is opened or closed and when the gate is open the locking bar 18 is moved into the position shown in Fig. 6, where the control lever 12 is locked against movement in either position from its off position. The functioning of this part of my invention corresponds to that of my Patent 1,099,081 to which reference has already been made.

Pivotally mounted. on the car at 20 is a lever 21 which is guided by a strap 22 which limits its up and down movement about the pivot 20, and it has a laterally extending lug or projection 23 near its outer end. This lug extends outwardly into the space between the car and the well door and coperates withv the mechanism on the door as hereinafter explained.

Y The lever 21 has an arm 2 4 which is connected by Va link 25 tok the short arm of the bell crank lever 16, the arrangement of parts being such that when the car gate 11 is closed the lever 21 is elevated (as shown in Fig. 2), and when the gate is open the lever occupies its lower position as shown 1n Fig. 1. y

Referring now more particularly to the well,-26 is one of the floors of the building; 27 the well door, and 28 a locking bar or bolt which is mounted to slide vertically in guide brackets 29 near the back edge of the well door. f l

When the door is closed as shown in Fig. 2, the bolt 28 engages at its lower end, a suitable socket 30 in the floor.

Pivotally mounted on the bolt 28 near its lower end is a wheel or roller 31 which is adapted to engage a rail 32 which is supj ported a short distance above the Hoor and VhasY a downwardly curved end 33 on which the'wheel rides when the door is opened or closed. l

The rail is so located as to hold the bolt 28 in an elevated position as long as the door is open, but permits the bolt to fall and engage the socket 30 when the door is shut.'

In opening the door, it isnecessary for.

the operator to iirst liftvthe bolt to disengage its lowerV end from the socket 30- and this is accomplished by a rotatable'shaft 34 which'is mounted in suitable bearings 85 onl the inner face of the door andextends transversely thereof. Secured to one end of i this'shaft is a crank arm 86 which is link- Y connected to the locking bar 28. Instead of utilizing al rigid link between the crank 36 and the locking bar 28, I prefer to utilize a compression link composed of a rigid section 37 and a spring socket 38 having a compressionspring 89 within it, and a cap 4U through which the end of the rigid section 37 extends. This end of the rigid section is enlarged y'as shown at 41 and is acted upon by the spring 39 so that the link functions in thel usual manner but is adapted to yield as hereinafter explained if the car should creep, or some similar emergency arise.

Secured to the shaftl 34 is an interlocking bar 42 which extends substantially parallel to the shaft between the bearings 35. The arrangement of parts is such that when the well door is'shut and the bolt is in its lower position in engagement with the socket 80, the rod 42 is elevated Vas shown in broken lines in Fig. 4, and the gate 11 of the car may be opened and closed at will. If, on the'other hand, the well door is open, and the bolt elevated by the engagement of the wheel 31 and the rail 32, the rod 42 is in the path of movement of the' outwardly extending lug 23 of the lever 21, the arrangement of parts being such that the car gate 11 caunot be closed until the well dooi is closed.

As already explained, the control lever cannot be moved except when the car gate is closed and it follows that the elevator control lever cannot be moved from its oil position until both the well door and the car gate are shut.

Assuming that the well door is shut and that the car gate is shut, the operator is free to move the lever as desired, and the operator may move the elevator either upwardly or downwarly to some other floor. When he stops at the desired floor, his lever must be brought to its off position in order to open the gate. I-Ie will of course ordinarily move his lever to its oii' 7 position in stopping the car but if his power should fail for any reason he will find it impossible to open the gate if his lever is left in anything but the oli' position. This is by reason of the fact that the shaft 15 cannot be turned to a material extent, with the lever in anything but its central position, because of the interference between the locking bar 18 and the lever.

Assuming that he has stopped the car and brought his lever to its olf position he may freely open the gate and in so doing lock his control lever in its central olf position and furthermore lowers the lever 21 so that the lug 23 is below the rod 42 on the well door.y To open the well door the operator grasps the rod 42 which occupies the dotted position of Fig. 4 and pushes it downwardly, thereby turning the shaft 34, raising the bolt 28 and permitting the door to be swung open.

Since the rod 42 extends across the dooi` it is in a particularly convenient position to grasped by the hand of the operator and it is not necessary for him to hold the rod 42 down since the wheel 31 immediately rides onto the rail 32 and holds the bolt as soon as the door opens to a small extent. The rod 42 is now positively held in the position shown in full lines in Fig. 4 and in the position shown in iFig. 3, so that it is impossible for the operator to either shut the gate 11y or start his car until the door is entirely closed. c

My invention may be embodied in mechanisms which differ materially from that shown and described, and I intend only such limitations as are imposed by the appended claims.

i What I claim is:

1. The combination with an elevator shaft having a door and a lock for holding the ydoor shut, of a car having a gate, a control and means for preventing the closing of the car gate at one of the floors of the shaft eXcept when the shaft door is closed and locked.

2. The combination with an elevator shaft door having a bolt, means for holding the bolt in released position except when the door is closed, an interlocking rod operatively connected to the bolt, a car, a control lever therein, and an interlocking mechanism connected with the control lever and arranged to coact with the interlocking rod for preventing the movement of the control lever except when the shaft door is closed.

3. The combination with an elevator shaft door having a bolt, means for holding the bolt in released position except when the door is closed, an interlocking rod operatively connected to the bolt, a car, a controller therein, and means connected with the controller and arranged to coact with the interlocking rod for preventing the controller from being actuated except when the shaft door is closed.

4:. The combination with an elevator shaft door, of a car, a control lever therein, a locking bar for the lever, a gate operatively connected to the locking bar and an interlocking lever also connected to the locking bar and means on the shaft door arranged to cooperate with the interlocking lever, to prevent the closing of the car gate when the shaft door is open.

5. The combination with an elevator shaft door, of a car, a control lever therein, a locking bar for the lever, a gate operatively connected to the locking bar and an interlocking lever also co-nnected to the locking bar and means on the shaft door arranged to cooperate with the interlocking lever, to prevent the movement of either the car gate or the control lever when the shaft door is open.

6. rlhe combination with an elevator shaft door, a stationary rail, a vertical bolt for locking the door closed, means on the bolt adapted to engage the rail and hold the bolt in a released position when the door is open, and an interlocking rod operatively connected with the bolt, of a car, a controller therefor, and locking means arranged to cooperate with the interlocking rod to prevent the controller from being operated when the shaft door is open.

7. The combination with an elevator shaft door, a stationary rail, a vertical bolt for locking the door closed, means on the bolt adapted to engage the rail and hold the bolt in a released position when the door is open, and an interlocking rod connected with the bolt and arranged to be swung to a released position when the door is closed, of a car, a control lever therein, a locking bar for the lever, and a lever operatively connected to the locking bar and having a projection with the bolt and arranged to be swung to a released position when the door is closed, of a car, a control lever therein, a locking bar for the lever, and a lever operatively connected to the locking. bar and having a projection arranged to interfere with the interlocking rod of the shaft door and prevent the operation of the control lever when the shaft door is open.

9. The combination with an elevator shaft door, a stationary rail, a vertical bolt for locking the door closed, means on the bolt adapted to engage the rail and hold the bolt in a released position when the door is open, and an interlocking rod connected with the bolt and arranged to be swung to a released position when the door is closed, of a car, a gate therefor, a control lever therein, a locking bar for the lever, an operative connection between the locking bar and the gate, and a lever also connected to the locking bar and having a projection arranged to coperate with the interlocking rod of the shaft door.

l0. The combinati-on with an elevator shaft door, a bolt for locking the door closed, a stationary rail aiiixed to the shaft structure adapted to hold the bolt in a released position when the door is open, an interlocking rod connected with the bolt and arranged to be swung to a released position when the door is closed, of a car, a controller therefor, and locking means arranged to coperate with the interlocking rod to prevent the controller from being operated when the shaft door is open.

11. rlhe combination with an elevator shaft door, a bolt for locking the door closed, a stationary rail adapted to hold the bolt in a released position when the door is open, an interlocking rod connected with the bolt and arranged to be swung to a releasedposition when the door is closed, of a car, a control lever therein, a locking bar for the lever, and a lever operatively connected to the locking bar and having a projection arranged to interfere with the interlocking rod of the shaft door and prevent the operation of the control lever when the shaft door` is open.

12. The combination with an elevator shaft door, a lock therefor and a gate interlock movable therewith, and means for maintaining the lock in released position and the gate interlock in its moved position, when the door is open, of a car, a car gate, a control lever in the car, a lock for the control lever, a mechanical connection between the control lever lock and the gate, whereby said control lever lock is actuated by the movement of the gate, and means connected With said mechanical connection arranged to engage said gate interlock, whereby said gate is I Copies of this patent may be obtained for held from being moved to release the control lever lock When the gate interlock is maintained in its moved position.

n Witness whereof, I have hereunto set my hand this 16th day of Jan., 1917.

WILLIAM KEATING.

ve cents each, by addressing the Commissioner of Iatents, Washingtoml). C. 

